What is 80 percent of 40 (80% of 40)

What is 80 percent of 40? Here is an easy method to solve percentage calculations such as what is 80% of 40.

You can solve this type of calculation with your own values by entering them into the calculator's fields, and click 'Calculate' to get the result and explanation.

What is% of

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This is a simple method for solving percentage equations. Use this calculator for business, classroom assignments, when shopping, and in general daily life where percentage calculations are needed.

Want to learn the fastest method for calculating 80 percent of 40 (80% of 40)?

Assume the unknown value is 'Y'

100% / 40 = 80% / Y

100 / 40 = 80 / Y

Y ( 100 / 40 ) = 80

Y = 80 ( 40 / 100 )

Y = 32

Answer: 80 percent of 40 is 32

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What are percentages

Percentages are similar to fractions with an important difference. In fractions the whole is represented by the denominator (e.g. the number 5 in the fraction of 1/5). In percentages, the whole is represented by the number 100. In fact, 'per cent' means 'per 100' or 'for each 100'.

How to solve

In this example, the number 40 represents the whole and so, as a percentage, it would be equal to 100%. Written as a ratio, we would get: 100% : 40

If a student took a 40 question test and they got every answer correct, as a percentage they would get a 100% score on the test.

In our problem we have to evaluate the 80 percent of 40. For now, let's call this unknown value 'Y'. Written as a ratio, we would get: 80% : Y

To see a relationship between these two ratios, let's combine them into an equation: 100% : 40 = 80% : Y

It is critical that both of the % values should be on the same side of a ratio. For instance, if you decide to put the % value on the right side of a ratio, then the other % value should also be on the right side of its ratio.